Southern Cross Pottery British Berkefeld (Doulton) Ultra Sterasyl Gravity Ceramic Water Filter Candle (Replacement)

Southern Cross Pottery British Berkefeld (Doulton) Ultra Sterasyl Gravity Ceramic Water Filter Candle (Replacement)

Southern Cross Pottery British Berkefeld (Doulton) Ultra Sterasyl Gravity Ceramic Water Filter Candle, manufactured by Fairey Industrial Ceramics Ltd (Royal Doulton), is considered the best gravity filter manufactured anywhere.

The British Berkefeld (Doulton) Ultra Sterasyl® filter, removes everything the Super Sterasyl® filter does with additional heavy metal capabilities and unparalleled filtration of up to 99.38% of PFAS (PFOA & PFOS) contaminants. This filter does not remove fluoride, if fluoride is an issue you can view fluoride filters here.

With its Absolute filtration rating (defined as >99.99%) of 0.9 microns, this filter is highly effective against particulate contamination, pathogenic bacteria, cysts, giardia, cryptosporidium as well as chlorine and organic removal capabilities.

Made from durable, food-grade materials and NSF certified, it represents the premium quality and reliability you expect from the Doulton brand.The Ultra Sterasyl Filter has been specially manufactured by Doulton for Southern Cross Pottery

This filter will fit all Southern Cross Pottery models as well as most other brands with single filter chambers including Earthtank, Village Pottery Company, Sean Nicholson Clay, Durand, Waterco, Australis, Stefani, Pozzani, Peter Wallace Pottery, and Filteroo and many more. Just check the filter dimensions will be suitable for your system: Dimensions: height 146 mm (5 3/4 inch) - width 67 mm (2.5 inches). Thread size 11mm.

The small amount of plastic used in the candle frame is BPA-free.

No need to sterilise or boil water, as the Doulton® proprietary system inhibits microbiological growth.

Each Ultra Sterasyl candle has a unique 10-digit code on the filter frame, guaranteeing authenticity.

The Ultra Sterasyl is the only NSF certified NSF 42/53/372/401 ceramic gravity water filter in the world

The Sterasyl Ceramic Shell

The Sterasyl grade ceramic is designed to remove suspended solids and pathogenic bacteria (>99.99%). The filter elements are produced using the latest ceramic techniques, effective against hard-shelled parasites such as Cryptosporidium as well as pathogenic bacteria. The ceramic also removes other less harmful, but equally unpleasant particulate debris such as rust and dirt.

Composition of the Sterasyl ceramic contains pure silver. This silver is a material designed to inhibit microbiological growth within the ceramic. 

Multistage filtration

Stage 1
Outer Shell – Microfiltration of bacteria, cysts, and particles

Stage 2
Anti-bacterial formulation contains silver to inhibit microbiological growth within the ceramic

Stage 3
Activated carbon takes out chlorine and organics, improving taste and odour

Stage 4
Heavy metal reduction media which takes out toxic lead and PFAS

Contaminant Removals/Reduction

Southern Cross Pottery British Berkefeld (Doulton) Ultra Sterasyl Gravity Ceramic Water Filter Candle removes/reduces the following contaminants:

• PFAS: > 99.38%
• Pathogenic Bacteria (E. coli, Cholera, Shigella, Salmonella, Klebsiella): > 99.99%
• Cysts (Giardia & Cryptosporidium): > 99.99%
• Chlorine Reduction: > 98.90%
• Lead: > 99.39%
• Microplastics: > 99.99%
• Pesticide Reduction: > 99.00%
• Algae, Rust, Sediment & Suspended Solids: > 99.99%
• Pharmaceutical Reduction: > 99.00%
• Glyphosate: > 99.94%
• Enhanced Organic (Lindane, Atrazine, Benzene): > 99.00%
• Absolute Filtration: 0.9 micron > 99.99%

Specifications

Replacement intervals: 6-9 months/1500 Litres (6 months recommended), depending on water quality and usage.

Dimensions: Height 146 mm (5 3/4 inch), width 67 mm (2.5 inches). Thread size 11mm.

Flow Rate under gravity: Approximately 700-900 mL per hour

Made in UK

BEFORE Installation

This step is important before installation to ensure correct water flow when filter is installed.

1) Place filter upside down in a glass of water overnight.

2) Remove from the water the following morning and shake for about 10 seconds.

Installation

Install gravity filter candle within the top chamber of your filter system. Gently hand tighten the plastic nut underneath.

After installation, before consumption

Flush the gravity filter candle before consumption by allowing a 2-4 litres of water to pass through the ceramic filter to remove any of the loose activated carbon particles.

Dispose of the first few litres of filtered water that may contain fine carbon particles. The fine particles are harmless and are a result of the manufacturing process.

Initial taste of water with a new filter

It’s normal to notice a slight metallic or earthy taste when using a new filter for the first time. This taste is caused by the carbon inside the filter.

The level of this initial taste can vary slightly from batch to batch, depending on the natural characteristics of the carbon. Some customers may notice no taste at all, while others might experience a mild to strong taste initially. Even those who haven’t noticed a taste in the past may experience it with a new filter at some point. This is completely normal and expected.

The taste typically fades within 1–2 weeks of regular use, which is approximately 28–56 litres of water (based on using around 4 litres per day). Flushing a few extra litres each day can help speed up the process if desired.

Rest assured, the water is safe to drink during this period, and the taste will gradually fade with continued use.

Ceramic Filter Appearance

Due to the nature of ceramic materials, these filters may have minor cosmetic imperfections, such as small scratches or chips. Rest assured, these imperfections do not affect the filter’s performance or durability.